On Apr 1, 2007, at 8:14 AM, Vasile Surducan wrote:

> It's not 0.3V.

It is according to assorted datasheets.  Not just microchip, either.
(although the 16F54 that Peter specifically complains about still says
-0.6 to Vcc+0.6)

Still, it seems to me that MOST pins in any circuit are not going to
need additional protection, and the pins that DO need protection were
likely to have needed it even with the old specs.  I suspect Peter's
problems are due more to a particularly sensitive chip/batch/unit than
the change in the specs; as he says, I would have expected more noise
if expensive external protection networks had suddenly become necessary
on most microcontroller pins.

BillW

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